Disney Springs is at least five years late. Once the decision was made to close down the nightclubs, it should have been fast tracked and construction started immediately after the last club closed down. Instead, that area has laid largely dormant for the past half decade. Unacceptable.
Avatarland is gonna happen...though it remains to be seen if it will be the same scope and scale revealed to date. Budget overruns and other factors could easily pare that land down. Don't think they'd do it? These are the same people who thought that Chester and Hester's was a good idea, while also spending millions on a wand and a big hat that adds nothing but a pin trading location (a store)...money that could and should have been funneled into creating a better experience elsewhere in the parks. Though I am not fond of James Cameron...he may be the saving grace for that expansion as he has a vested interest in making sure his IP is presented well...
All that being said, how long did it take. Uni to build out the Harry Potter expansion? How long has NFE taken? Disney just doesn't seem to have any sense of urgency in these matters, but watch how fast they can toss up new DVC rooms!
Star Wars lands are still rumors...we shall see. In any case, HS is in dire straights, and the backlot tour is filthy and falling apart. They could easily have gone gusto and dropped in Cars Land or expanded Pixar Place with rides that have already been in development (doors coaster?). Right now, SW land is killing any chance of either happening, and they are gonna wait, I suspect, to see how the new movies fare. Disney should have been doing all of the above...not twiddling it's thumbs.